His opinions are similar yours but different Julia's.
A:to; from
B:from; to
C:as; with
D:with; as
①0.5mol•L﹣1的H2SO4溶液,②0.05mol•L﹣1的Ba(OH)2溶液,③1mol•L﹣1的NaCl溶液,④纯水.
Jiangyin a lot since 1978.
超声波是一种( )